NASA Photo ID: S82-32076 File Name: 10060790.jpg Film Type: 4x5 b&w Date Taken: 06/09/82 Title: STS-4 suited astronauts entering transfer van for trip to pad 39A for CDDT Description: Suited up for the STS-4 countdown demonstration Test (CCDT), Mission Commander Ken Mattingly, right, and Pilot Henry Hartsfield leave the Operations and Checkout (O&C) building for launch pad 39A. Jean String, a KSC physical security specialist, exhanges greetings with Mattingly as she opens the door to the van that will take them to the pad. Rick Nygren, far left, of the Vehicle Integration Test Team, accompanies the astronaut pair.